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chapter 16 vocab
5 ATHENA ch 16 Scott Foresman 2008
terms | definitions |
---|---|
light-year | the distance light travels in one year |
nebula | a cloud of gas and dust in which new stars form |
supernova | a gigantic explosion that occurs near the end of the life of some stars |
black hole | a point in space that has such a strong force of gravity that nothing within a certain distance of it can escape |
galaxy | a huge system of stars, dust, and gas held together by gravity |
constellation | a group of stars that forms a pattern |